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Research Detail

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M. L. Das
Bangladesh Institute of Nuclear Agriculture, Mymensingh, Bangladesh

A. Rahman
Bangladesh Institute of Nuclear Agriculture, Mymensingh, Bangladesh

ln 43 strains/cultivars  of  mustard  (Bral·sica   campeslris L.  var.  Toria and  Yellow sarson) grown in two consecutive cropping seasons the heritabi­lity (broad sensee) and  genetic advance (%>  were found to be due to additive gene effect and highest for number of  pods on primary branch/ plant.  High heritability and low genetic advance,  mostly due to dominance and epistatic genes, were found in 1000-seed  weight.  Correlated response values  were highest for 1000-seed  weight (0.188).   followed by pods on primary branch/ Plant (0.1 81).  The  relative  selection  efficiency  was  found to be maximum for  these two  characters also (0.783 and 0.754, respectively).  Path analysis revealed that except  seeds/pod  all the  other characters had positi ve  direct effects  on yield.   Seeds/Pod, however, was not related to yield or any other character   directly.   Except  for  seeds/pod  selection may be carried out for five characters.  However, selection   for   pods  on primary  branch/plant and 1000-seed  weight  may  be given top  priority  for increasing   seed  yield of mustard.

 

 

 

 

 

  Oilseed, Mustard, Seeds/Pod, Yield
  BINA farm, Mymensingh
  01-07-1982
  30-06-1984
  Variety and Species
  Mustard

To find  out the  most important  selection criteria  using  correlation and path  coefficient analyses  in diverse germplasm of mustard, a major edible oil­ yielding crop  in Bangladesh.

The materials consisting   of 43 strains/cultivars of mustard  (Brassica   cam­ pestris L.  var. Toria  and Yellow sarson)  were grown in a randomized  block design  with three replications at  BINA  farm,  Mymensingh during  the winter seasons of 1982-83 and 1983-84. The unit plot  size was   9m2  with a spacing of  25 x 5 cm between rows and  plants, respectively. From  each plot  20 plants at   maturity were randomly sampled  to  record observations on plant    height (cm),  primary branch/plant,  pods  on primary  branch/plant, pods on secondary branch/plant, seeds/pod,  1000-seed  weight (g) and seed yield (g/ ha). Genetic  advance, expressed as percentage  of  mean and heritability (h2) in the broad  sense was  worked out, respectively.   Correlations, correlated response and  relative  selection efficiency  were also worked  out. Path coefficients for  the  relationship were  obtained  by solving simultaneous equations  which express  the  basic  relationship  between  correlation and path coefficients.

  The Bangladesh Journal of Scientific Research, Vol. – 7, No. – 1, June – 1989
  
Funding Source:
  

Correlated response values  were highest for 1000-seed  weight  (0.188). followed by pods on primary branch/ Plant (0.1 81).  The  relative  selection  efficiency was found to be maximum for  these two  characters also (0.783  and 0.754, respectively).  Path analysis revealed that except  seeds/pod  all the  other characters had positive direct effects  on yield. Seeds/Pod, however, was  not related to yield or any other character   directly. Except  for  seeds/pod  selection may be carried out for five characters.  However, selection  for  pods  on primary  branch/plant and 1000-seed  weight  may  be given top  priority  for increasing   seed  yield of mustard.

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